package yun2.shuxue;

import java.util.Scanner;

public class NumberOf1 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n =sc.nextInt();
		int count = 0;
		while(n>0) {
			n=n&(n-1);
			count++;
		}
		System.out.println(count);		
	}
}
